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United States Patent | 5,246,075 |
Caulfield | September 21, 1993 |
Apparatus having removable posts for guiding subsea well equipment. The apparatus includes a frame for permanent attachment to a well installation. The frame includes outwardly extending legs with each of the legs for receiving an upstanding retrievable guide post. Each leg includes a latching mechanism and a guide foot for receiving an upstanding guide post. The latching mechanism includes a retainer rotatable between a latching position, a latched position and an unlatched position. The latching mechanism preferably includes a handle connected to the retainer with the retainer being rotatably connected to the top of the frame. The retainer may include a beam for engaging a shoulder on the guide post when in the latched position. The handle is in a downward position when the retainer is in the unlatched position prior to the guide post being seated in the guide foot.
Inventors: | Caulfield; John K. (Houston, TX) |
Assignee: | National-Oilwell (Houston, TX) |
Appl. No.: | 817230 |
Filed: | January 6, 1992 |
Current U.S. Class: | 166/339; 166/342; 166/349; 405/195.1 |
Intern'l Class: | E21B 007/128 |
Field of Search: | 166/342,349,339 405/195,224,169 |
4391331 | Jul., 1983 | Shotbolt | 166/342. |
4405263 | Sep., 1983 | Hall | 405/224. |
4523878 | Jun., 1985 | Richart et al. | 405/195. |
4611661 | Sep., 1986 | Hed et al. | 166/339. |
4828035 | May., 1989 | McInturff | 165/339. |
4867605 | Sep., 1989 | Myers et al. | 405/169. |
4881850 | Nov., 1989 | Abreo, Jr. | 405/169. |
4927295 | May., 1990 | Knowles | 405/195. |
5002129 | Mar., 1991 | Hopper | 166/338. |
5007769 | Apr., 1991 | Legris et al. | 405/195. |